don't know if you've noticed this, but sometimes, when you go outside, there are these big fluffy
white things in the sky. We call them clouds.
And even though we think of them as being gaseous, clouds are actually made of condensed
water vapor -- so, they’re actually made of droplets of liquid water, or sometimes
ice, stuck to tiny bits of dust and other particles.
And clouds can take different forms, depending on factors like altitude and temperature and
humidity.